Oil-pump jack.



W. S. POINDEX'TER 8.1 M. E. WAGNER?v ou PUMP JACK. APPucATloN man APR.2V%.'1916.

Pateted Dec. 19, 1916'.I

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ont-PUMP I ACK. APFLICATQON FIL-ED APR. 24. |916.

Patented Dec. 19, 1916.

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i:wiLIIAM s. POI'ND'EXTE'R AND MYRON E. WAGNER, oF BRIDGEP'on'r, inLIivoIs.

'OIL-PUMP JACK.

Application filed April 24, 1916. Serial No. 93,1866.

To all whom it may concern: Y

Be 1t known that we, WILLIAM S. POIN- DEXTER and MYRON E. WAGNuR,c1t1zens of the United States,'residing at Bridgeport, in

the county of Lawrence and State of Illinois, have inventedcertain new and useful Improvements in Oil-Pump Jacks; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention is an improved oil pump jack of the class comprising an oscillating bell crank lever composed of a trio of pipes connected by 'suitable castings, lthe main object ofthe invention being to improve upon the construction of the end castingsv to such 4an extent as to allow the easy application or removal of the usual reciprocating links.

A further object of the invention is to provide a device of the class described which will be extremely simple and inexpensive yet which regardless of these details will be highly efficient and durable.

With these general objects in view, the invention resides in certain novel features of construction and in unique combinations of parts to be hereinafter fully described and claimed, the descriptive matter being supplemented by `the accompanying drawings which constitute a part of this application and in which,

Figure 1 is aside elevation of the improved jack applied; Fig. 2 is a similar view with the center and end castings in vertical section; Figu is a front elevation; Fig. 4 is an enlarged transverse section taken on the plane of the line 4.--4 of Fig. 1; Fig. 5 is a perspective view of one of the end castings; and Fig. 6 is a similar view of the bearing for connection with said castings.

In specically describing the construction shown in the drawings above'briefly described, similar characters will beplaced onA Specification of LettersiPatent.

Patenten Dec; ia, '1916.

end of. the horizontal pipe. The adjacent ends of the pipes 3 and 2 are connected by an appropriate two piece corner casting 5,

while two piece end castings 6 and Vv6a areA disposed respectively at`the upper and lower ends ofthe pipe 4 and connect said ends with the adjacent ends of the pipes 3 and 2.

The corner casing 5 has formed therethrough a hexagonal bore 7 in which a suitable bushing 8 snugly fits, s aid bushing having a circular bore receiving rather loosely a wear sleeve 9 through which a fulcrum bolt 10 passes. The bolt 10 projects beyond the ends of the sleeve 9 and bushing 8, the projecting ends o-f said bplt passing through'the upper ends of a pair of supporting legs 11vwhose lower ends are provided.

with arched feet 12 which rest on a pipe orthe like which serves as a supporting base therefor. The pipe 13 may either rest on the surfacey of the earth or may be embedded therein.

The legs 11 are suitably braced by provision of a pair ofguys 14: which lead from the ends of the bolt 10 to suitable dead men (not shown).

The form of bearing shown and described for the casting 5 is a rather salient feature, since by its use lworn parts may be readily removed and replaced when necessary, thus rendering the jack as eiiicient as if new, that is 'regarding these features. It will be understood, however, vthat other types of Vbearings could -be well used for the casting in question.

The most important features of the present inventionreside in the construction of the end castings 6 and 6a and the parts coperating therewith in the manner to be described.

Both castings 6 and 6a are substantially identical, in view of which fact we will describe only the casting 6 in detail and will then point out the diferences between this casting and 6a.

The aforesaidcasting 6 is formed with sockets 15 and 16 which receive `therein the adjacent endsof the pipes 3 and 4, and on its upper edge said castingis provided with a pair of integral undercut ribs 17 which extend transversely of` the pipe 3V and which terminate'flush with the flat upright sides of the casting. Received between the ribs 17 and having downwardly diverging side:- walls slidably engaging the undercut inner faces of said ribs, is a bearing 18Y having a .En srxrns rnrnnfr carton.

cylindrical bore 19 extending longitudinally thereof, said bearing being equal in length to the ribs 17 as shown.

Received in the bore 19 is a sleeve 20 which is a trifle longer than the bearing 18 in order that it may space a pair of upright links 21 a suflicient distance from said bearing and sides of the casting 6 to prevent unnecessary friction. The links 21. abut the ends of the sleeve 2O as shown most clearly in Figs. 3 and 4 and are held in this position by a bolt 22 which passes through said sleeve and links.

The lower ends o-f the links 21 are pivoted in any suitable ma-nner to a cross head 23 connected by a clamp or the like 24 with the vertical operating rod 25 of an oil pump 26. Thus, when the bell crank 1 is oscilla-ted by means yet to be described, the rod 25A will be reciprocated vertically to actuate the pump. During this operation, although no clamping -screws or the like are provided for holding the bearing 18k between the ribs 17, said bearing cannot be dislocated since it is held against endwise shifting by the links 21 which stra-ddle the casting 6. This arrangement also prevents the sleeve 20 from shifting out of the bore 19. In U. S. Patent #1,162,509 of November 30, 1915, which patent was issued to one of the applicants of the present case, a similar arrangement for connecting the pump rod with the bell crank is shown, but in this patent the arrangement of parts is such as to necessitate the use of a set screw for holding the removable bearing against movement in respect to the jack, and obviously if this screw should loosen, the connection between the pump and jack will be broken. By the use of the ribs 17 positioned transversely of the jack, however, and the other cooperating parts arranged as shown and described, this difficulty is overcome, thereby increasing the eliiciency of the device. Furthermore, the jack constructed in the improved Inanner may be manufactured more cheaply.

The end casting 6L is identical in construction with the casting 6 with the exception that two pairs of undercut ribs 17a are provided. A bearing 18a may be received between the ribs of either pair for connecting a pair of surface rods or links 21a to this end of the jack, the connection between said links 21a and the bearing 18@ being identical with that existing between the links 21 and the bearingr 18, further description being therefore unnecessary. The links 21u are reciprocated in the usual manner by any preferred mechanism and thus will oscillate the bell crank 1 to actuate the pump rod 25. From the foregoing, taken in connection copies of this patent may be obtained for with the accompanying drawings, the construction, manner of operation and advantages of the improved jack will be readily understood without requiring a more extended explanation. In conclusion, however, we will state that although we have shown and described certain specific details for illustrative purposes, numerous changes may he made within the scope of the invention as claimed without sacrificing the main advantages thereof.'

We claim z- 1 1. An oil pump jack comprising a bell crank fulcrumed between its ends and having at one end a casting formed with a pair of parallel vundercut ribs extending transversely of the crank, a bearing slidably held between said ribs, said bearing having a bore extending transversely of the crank, a shaft mounted in said bore and extending beyond the ends of the bearing, a pair of links connected one to each end of said shaft and disposed in close proximity to the opposite sides of the casting whereby to prevent endwise shifting of the bearing,

and an additional pair of linksl connected with the other end of the bell crank, one pair of said links being adapted to serve as means for oscillating the bell crank, while the other pair is adapted to connect said crank with the pump.

2. An oil` pump jack comprising a bell crank fulcrumed between its ends and having` at one end a casting formed with a pair of parallel undercut ribs extending transversely of the crank, a bearing slidably held between said ribs, said bearing having a. bore extending transversely of the crank, a sleeve mounted in said bore and extending slightly beyond the ends thereof and beyond the opposite sides of the casting, a pair of upright links adjacent said sides of the casting and abutting the ends of the sleeve, a bolt passing through said links and sleeve for securing the former in po-sition, said links also serving toprevent endwise shifting of the bearing, and an additional pair of links connected to the other end of the bell crank, one pair of links serving as oscillating means for said crank while the other pair is adapted to connect said crank with the pump.

In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

WILLIAM s. PoINDnx'rns. MYRoN E. WAGNER.

Witnesses:

" JASPER T. NEWELL,

WILLARD J WIswALL.

ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

